<!DOCTYPE html>
<html lang="cn">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <style type="text/css"></style>
   
</head>
<body>
    <script>
        //alert(222);//阻塞性
        //JS
        document.write("hello ,JS1 <br>");document.write("hello ,JS2 <br>");document.write("hello ,JS3 <br>");document.write("hello ,JS4 <br>");document.write("hello ,JS5 <br>");

        console.log(555);
    </script>
    

   
</body>
</html>


